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• How to compile ffmpeg4.4 with OpenCV3.4.13 to work in Android Studio4.2.1 (Java) [closed]

  8 juin 2021, par Fab

  Finally opencv is working in my Android Studio project (solved with help of https://www.youtube.com/watch?v=-0Yx1UzozzQ). But theres is no Video I/O information visible so I guess i didnt connected ffmpeg correctly in my project and it isnt used at all !?

  


  My steps so far :

  


  


  • ffmpeg download : https://www.videohelp.com/software/ffmpeg

    


  


  • added ffmpeg to path like explained here :
https://soundartifacts.com/how-to/186-how-to-install-ffmpeg-on-windows-10-amp-add-ffmpeg-to-windows-path.html#video
. Powershell shows that ffmpeg is installed.

    


  


  • when printing Core.getBuildInformation() in the project I see that the Video I/O section is empty and I assume there has to be some information about FFMPEG etc...see picture :
enter image description here

    


  


  


  

  • I dont get any error messages. I try to VideoCapture.open("somestring") and return value is always false.

  


  


  I know there are a lot of similar questions but I cant identify which one really addresses my issue.
Really appreciate your help. Thanks, Fabian

  


• Discord Bot can't play audio from YouTube all of a sudden

  22 mars 2023, par Aidan Tweedy

  Last night my Discord bot stopped working out of the blue. The bot had been working perfectly for months until this point - no code changes occurred and it was running in a Docker container on my home server. Then last night, my !play <url></url> command stopped working. The bot would join the voice channel, but not actually play anything. Then it would need to be manually disconnected from the voice channel in order for it to do anything again. After the first play fails, and I try again I get this error message :

  


   [youtube] crOZk88eCcg: Downloading webpage
 [youtube] crOZk88eCcg: Downloading android player API JSON
 [youtube] Extracting URL: https://www.youtube.com/watch?v=crOZk88eCcg&ab_channel=0foofighter0
 [youtube] crOZk88eCcg: Downloading webpage
 [youtube] crOZk88eCcg: Downloading android player API JSON
 [2023-03-22 00:27:59] [ERROR   ] discord.ext.commands.bot: Ignoring exception in command play
 Traceback (most recent call last):
   File "/usr/local/lib/python3.10/dist-packages/discord/ext/commands/core.py", line 190, in wrapped
     ret = await coro(*args, **kwargs)
   File "/usr/src/app/./main.py", line 180, in play
     voice.play(player, after=lambda e: print(f'Player error: {e}') if e else None)
   File "/usr/local/lib/python3.10/dist-packages/discord/voice_client.py", line 600, in play
     raise ClientException('Not connected to voice.')
 discord.errors.ClientException: Not connected to voice.
 
 The above exception was the direct cause of the following exception:
 
 Traceback (most recent call last):
   File "/usr/local/lib/python3.10/dist-packages/discord/ext/commands/bot.py", line 1347, in invoke
     await ctx.command.invoke(ctx)
   File "/usr/local/lib/python3.10/dist-packages/discord/ext/commands/core.py", line 986, in invoke
     await injected(*ctx.args, **ctx.kwargs)  # type: ignore
   File "/usr/local/lib/python3.10/dist-packages/discord/ext/commands/core.py", line 199, in wrapped
     raise CommandInvokeError(exc) from exc
 discord.ext.commands.errors.CommandInvokeError: Command raised an exception: ClientException: Not connected to voice.
 [2023-03-22 00:27:59] [INFO    ] discord.player: ffmpeg process 12 has not terminated. Waiting to terminate...
 [2023-03-22 00:27:59] [INFO    ] discord.player: ffmpeg process 12 should have terminated with a return code of -9.


  


  My first instinct was that ffmpeg was borking somehow, since it has been difficult to get working in the past. However I'm not sure how ffmpeg could've stopped working, since the bot never went down between working and not working. That leads me to believe it could be a change on Youtube/Discord's side ?

  


  For context, here is a snippet of my !play code :

  


  @client.command(pass_context = True)
async def play(ctx):
    url = ctx.message.content.split("!play ",1)[1]
    voice = discord.utils.get(client.voice_clients)
    if (ctx.author.voice):
        if voice == None:
            channel = ctx.message.author.voice.channel
            voice = await channel.connect()

        # Youtube Magic
        ydl_opts = {
        'format': 'worstaudio/worst',
        'postprocessors': [{
            'key': 'FFmpegExtractAudio',
            'preferredcodec': 'mp3',
            'preferredquality': '192',
        }],
        }

        if "http" not in url:
            yt = YoutubeSearch(url, max_results=1).to_json()
            print(yt)
            yt_id = str(json.loads(yt)['videos'][0]['id'])
            yt_channel = str(json.loads(yt)['videos'][0]['channel']).strip().replace(" ", "")
            url = 'https://www.youtube.com/watch?v='+yt_id+"&ab_channel="+yt_channel

        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            song_info=ydl.extract_info(url, download=False)
        for file in os.listdir("./"):
            if file.endswith(".mp3"):
                os.rename(file, "song.mp3")

        voice.stop()

        embed_trk = discord.Embed(
                title="Now playing",
                color=ctx.author.color,
        )
        video_title = song_info.get('title', None)
        video_channel = song_info.get('uploader', None)
        embed_trk.add_field(name="Track title", value=video_title, inline=False)
        embed_trk.add_field(name="Channel", value=video_channel, inline=False)

        await ctx.send(embed=embed_trk)
        player = await YTDLSource.from_url(url, loop=client.loop, stream=True)
        voice.play(player, after=lambda e: print(f'Player error: {e}') if e else None)
        while voice.is_playing():
            await asyncio.sleep(1)
        
        await request_record(ctx, video_title)

    else:
        await ctx.send("You must be in a voice channel to run this command")


  


• FFmpeg with yt-dlp in an android environment

  7 janvier, par Pastori

  i am currently working on an android application that initially needs to install a youtube video, here's what am using in my development environment : android studio, chaquopy, python (yt-dlp) and gradle groovy for builds, now i am facing a problem with yt-dlp and the error states the following : "ERROR : You have requested merging of multiple formats but ffmpeg is not installed. Aborting due to —abort-on-error", now clearly yt-dlp requires ffmpeg to work properly and i have looked into it and found FFmpegKit i got the latest android archive and i included it in my build, and it builds but yt-dlp still produces the same error, i don't really understand how the packages and environment works all that well but any help on this would be appreciated 👍

  


  NOTE : gradle builds perfectly fine i don't even get warnings it's just the yt-lp error during video download.

  


  // build.gradle (project level)
// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
    alias(libs.plugins.android.application) apply false
    id("com.chaquo.python") version "16.0.0" apply false
}


  


  // build.gradle (app level)
plugins {
    alias(libs.plugins.android.application)
    id("com.chaquo.python")
}

chaquopy {
    defaultConfig {
        buildPython("C:/Program Files/Python313/python.exe")
        buildPython("C:/Program Files/Python313/python.exe", "-3.8")
    }
    sourceSets {
        getByName("main") {
            srcDir("src/main/assets/python") // Tell Chaquopy to look here
        }
    }
}

android {
    namespace 'com.example.ytrans'
    compileSdk 34

    defaultConfig {
        applicationId "com.example.ytrans"
        minSdk 24
        targetSdk 34
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

        ndk {
            // On Apple silicon, you can omit x86_64.
            abiFilters "arm64-v8a", "x86_64"
        }

        python {
            version "3.8"
            buildPython "C:/Program Files/Python313/python.exe"
            pip {
                install "yt-dlp"  // This will install yt-dlp via pip
            }
        }

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_11
        targetCompatibility JavaVersion.VERSION_11
    }
}

dependencies {
    implementation libs.appcompat
    implementation libs.material
    implementation libs.activity
    implementation libs.constraintlayout
    testImplementation libs.junit
    androidTestImplementation libs.ext.junit
    androidTestImplementation libs.espresso.core
    implementation files("libs/ffmpeg-kit-full-6.0-2.LTS.aar")
}





  


      // java code
    public static void downloadVideo(String video_url, String output_path)
    {

        Python py = Python.getInstance();
        PyObject pyObj = py.getModule("yt_dlp_script"); // Import yt-dlp
        try {
            pyObj.callAttr("download", video_url, output_path);
            Log.i("VideoDownloader", "Video downloaded successfully!");
        } catch (Exception e) {
            Log.e("VideoDownloader", "Error downloading video: " + e.getMessage());
        }
    }


  


  # python script
import yt_dlp

def download(video_url, output_path):
    ydl_opts = {
        'outtmpl': output_path,  # specify the output file path
        'merge_output_format': 'mp4',
    }

    with yt_dlp.YoutubeDL(ydl_opts) as ydl:
        ydl.download([video_url])  # Download the video